Where would you be without your enemies?
Joseph said to his brothers who sold him into slavery, "What you intended for evil, God intended for good" (Genesis 50:20). Because of their betrayal, Joseph was able to rise to leadership in Egypt and help save his people (including his brothers) from famine in Canaan.
St. Thomas More observed that Joseph's brothers "could never have done him so much good with their love and favor as they did him with their malice and hatred."
I wouldn't be where I am in my life without a motley crew of "enemies." By God's providence, others' opposition (and even persecution at times) has propelled me toward success in various areas of my life. My enemies have inadvertently taught me lessons, opened doors, and helped me to grow.
This truth doesn't justify bad behavior, but it does give cause for glorifying God's goodness in the wake of human evil.
Any person worth his or her salt has enemies.
Instead of begrudging them and becoming bitter, what if we gave thanks for them and became better?